open access

https://hdl.handle.net/2115/93998

Brain activity supporting alternating speech for semantic words : simultaneous magnetoencephalographic recording

英語

theory of mind

2024-02-10

Oxford University Press

Cerebral Cortex

34(2)

bhae031

Communication, especially conversation, is essential for human social life. Many previous studies have examined the neuroscientific underpinnings of conversation, i.e. language comprehension and speech production. However, conversation inherently involves two or more people, and unless two people actually interact with one another, the nature of the conversation cannot be truly revealed. Therefore, in this study, we used two magnetoencephalographs that were connected together, and simultaneously recorded brain activity while two people took turns speaking in a word association/alphabet completion task. We compared the amplitude modulation of the alpha- and beta-band rhythms within each of the 62 brain regions under semantic (word association; less predictable) and non-semantic (alphabet completion; more predictable) conditions. We found that the amplitudes of the rhythms were significantly different between conditions in a wide range of brain regions. Additionally, significant differences were observed in nearly the same group of brain regions after versus before each utterance, indicating that a wide range of brain areas is involved in predicting a conversation partner’s next utterance. This result supports the idea that mentalizing, e.g. predicting another person's speech, plays an important role in conversation, and suggests that the neural network implicated in mentalizing extends over a wide range of brain regions.

学術雑誌論文

Accepted Manuscript

This is a pre-copyedited, author-produced version of an article accepted for publication in Cerebral Cortex following peer review. The version of record Risa Anada, Hayato Watanabe, Atsushi Shimojo, Hideaki Shiraishi, Koichi Yokosawa, Brain activity supporting alternating speech for semantic words: simultaneous magnetoencephalographic recording, Cerebral Cortex, Volume 34, Issue 2, February 2024, bhae031 is available online at: https://doi.org/10.1093/cercor/bhae031.

1047-3211

1460-2199

AA10777916